#include "rs232.h"
#include "error_management.h"
Go to the source code of this file.
Functions | |
int | rs232_close () |
int | rs232_open (char *_port, int baud_rate, int byte_size, int parity, int stop_bits) |
int | rs232_read (void *buffer, int size, int *_read_bytes) |
int | rs232_write (void *buffer, int size, int *_written_bytes) |
Variables | |
static COMMTIMEOUTS | g_cto |
static DCB | g_dcb |
static HANDLE | handle_com = NULL |
int rs232_close | ( | ) |
Definition at line 123 of file DATA_GET/rs232.c.
References handle_com.
00124 { 00125 CloseHandle(handle_com); 00126 return 1; 00127 }
int rs232_open | ( | char * | _port, | |
int | baud_rate, | |||
int | byte_size, | |||
int | parity, | |||
int | stop_bits | |||
) |
Definition at line 81 of file DATA_GET/rs232.c.
References ASSERT, g_cto, g_dcb, handle_com, RS232_RX_SIZE, and RS232_TX_SIZE.
00082 { 00083 // Make sure another port is not already opened 00084 ASSERT(!handle_com); 00085 00086 // Open the existing COMX file to open the port 00087 handle_com = CreateFile( 00088 _port, 00089 GENERIC_READ | GENERIC_WRITE, 00090 0, 00091 NULL, 00092 OPEN_EXISTING, 00093 FILE_ATTRIBUTE_SYSTEM, 00094 NULL); 00095 00096 // Make sure it is opened 00097 if (handle_com == INVALID_HANDLE_VALUE) 00098 return 0; 00099 00100 // buffer size for emission and reception 00101 SetupComm(handle_com, RS232_RX_SIZE, RS232_TX_SIZE); 00102 00103 // COM port configuration 00104 g_dcb.BaudRate = baud_rate; 00105 g_dcb.ByteSize = byte_size; 00106 g_dcb.Parity = parity; 00107 g_dcb.StopBits = stop_bits; 00108 if(!SetCommTimeouts(handle_com, &g_cto) || !SetCommState(handle_com, &g_dcb)) 00109 { 00110 CloseHandle(handle_com); 00111 return 0; 00112 } 00113 00114 // Flush buffers for emission and reception 00115 // DTR = 1 00116 PurgeComm(handle_com, PURGE_TXCLEAR | PURGE_RXCLEAR | PURGE_TXABORT | PURGE_RXABORT); 00117 EscapeCommFunction(handle_com, SETDTR); 00118 00119 return 1; 00120 }
int rs232_read | ( | void * | buffer, | |
int | size, | |||
int * | _read_bytes | |||
) |
Definition at line 130 of file DATA_GET/rs232.c.
References DWORD, and handle_com.
00131 { 00132 return ReadFile(handle_com, buffer, size, (DWORD *) _read_bytes, (LPOVERLAPPED) NULL); 00133 }
int rs232_write | ( | void * | buffer, | |
int | size, | |||
int * | _written_bytes | |||
) |
Definition at line 136 of file DATA_GET/rs232.c.
References DWORD, and handle_com.
00137 { 00138 return WriteFile(handle_com, buffer, size, (DWORD *) _written_bytes, (LPOVERLAPPED) NULL); 00139 }
COMMTIMEOUTS g_cto [static] |
Initial value:
{ RS232_MAX_WAIT_READ, 0, RS232_MAX_WAIT_READ, 0, 0 }
Definition at line 39 of file DATA_GET/rs232.c.
DCB g_dcb [static] |
HANDLE handle_com = NULL [static] |
Definition at line 36 of file DATA_GET/rs232.c.